When gasoline and water are poured into the same container, they form two distinct layers. what do you need to know to predict which liquid will be on top ?

Water and gasoline have different densities so they will never mix, regardless of which you put first.  

The gasoline will be the one on top because water is more dense.\

~*"AUBA14"*~

14 days is the half-life of phosphorus-32

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.